Try/Catch Error Perf

JavaScript performance comparison

Revision 40 of this test case created by Josh

Preparation code

<script>
  function tryCatch(undef) {
    try {
      return undef.prop;
    } catch (ex) {
      return null;
    }
  }

  function ifCheck(undef) {
    if (undef !== undefined) {
      return undef.prop;
    } else {
      return null;
    }
  }

  function ifCheck2(undef) {
    if (undef !== undefined) {
      return undef.prop;
    }
  }

  function typeofCheck(undef) {
    if (typeof undef !== 'undefined') {
      return undef.prop;
    } else {
      return null;
    }
  }

  function andCheck(undef) {
    return undef && undef.prop;
  }
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Try Catch
tryCatch({prop1: 1});
pending…
If Check
ifCheck({prop1: 1});
pending…
And check
andCheck({prop1: 1});
pending…
Typeof check
typeofCheck({prop1: 1});
pending…
If check 2
ifCheck2({prop1: 1});
pending…

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Revisions

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